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11. 发明专利

JPH1010234A RADIOACTIVITY MEASURING SYSTEM 失效
公开(公告)号：JPH1010234A
公开(公告)日：1998-01-16
申请号：JP16410896
申请日：1996-06-25
申请人： HITACHI LTD
发明人： URATA MEGUMI
IPC分类号： G01T1/16 , G01S1/00 , G01T1/169
摘要： PROBLEM TO BE SOLVED: To measure positional information and radioactivity accurately by receiving signals from a plurality of distributed radio transmitters every time when a radiation measuring unit movable in a work area performs a measurement thereby obtaining the information of measuring position. SOLUTION: A radiation measuring unit employs a portable dosimeter, e.g. an ionization chamber survey meter or a patrol meter, having a radiation measuring section and a radio receiving section. At least three radio transmitters 7-10 are provided on each operation floor 1 and the radio receiving section receives radio signals 11-14 from the transmitters 7-10 and calculates an angle and a distance thus determining a radioactivity measuring point 6. The survey meter comprises a memory for storing the radiation measurements and the position of the measuring point 6. Since a plurality of transmitters 7-10 are provided, an obstacle existing at an intermediate position can be covered by other signals. According to the arrangement, the measuring point 6 can be determined accurately and automatically.

12. 发明专利

JPH0990040A SYSTEM AND METHOD FOR REDUCING RADIATION EXPOSURE AND METHOD AND INSTRUMENT FOR MEASURING RADIATION 失效
公开(公告)号：JPH0990040A
公开(公告)日：1997-04-04
申请号：JP24588695
申请日：1995-09-25
申请人： HITACHI LTD
发明人： URATA MEGUMI
IPC分类号： G01T1/00 , G01T1/169
摘要： PROBLEM TO BE SOLVED: To provide a radiation exposure reducing method by which the protective clothing to be worn by workers can be changed in accordance with the surface concentration of radioactivity so that the workers can efficiently work in a facility contaminated with radioactivity and the radiation exposure of the workers can be reduced. SOLUTION: In a radiation exposure reducing method, the radiation exposure of workers is reduced by changing the protective clothing to be worn by the workers in a nuclear facility. In this method, the information on the positions and surface concentrations of radioactivity obtained by means of radioactivity detecting devices 8 and 11 are stored in advance and the secular change of the density of a radioactive material at each location in the facility is calculated 12 from the stored information, and then, the density map of the radioactive material is prepared from the calculated results. At the same time, the protective clothing to be worn by the workers at each location in the facility shown on the map is selectively displayed 13 from the data inputted in advance.

13. 发明专利

JPH07260941A DOSE RATE DISPLAY DEVICE 失效
公开(公告)号：JPH07260941A
公开(公告)日：1995-10-13
申请号：JP4676494
申请日：1994-03-17
申请人： HITACHI LTD
发明人： URATA MEGUMI
IPC分类号： G01T1/00 , G01T1/169
摘要： PURPOSE:To allow a skilled worker to undertake a work and shorten a working time by reducing an exposure amount for a work at a place where the dose rate of a radiation is high. CONSTITUTION:At a pre-work meeting, an instruction is given for a worker to stay away as far as possible from a pipe line 2, a valve 1, a recirculation pump 4 or the like as large equipment, and a piping section is irradiated in orange color or the like over an area 12, using a laser beam emitter 11. As a result, it can be understood that a work should be undertaken at a place away from the pile line 2 or the pump 4. Furthermore, a worker overhauls and checks a valve 3 from the opposite side of the valve 1. In this case, a laser beam has high directivity, and can indicate only the required irradiation section of plant equipment as an object in an efficient and concentrated way, in line with the shape of the equipment.

14. 发明专利

JPH0478960B2 失效
公开(公告)号：JPH0478960B2
公开(公告)日：1992-12-14
申请号：JP22900087
申请日：1987-09-12
申请人： HITACHI LTD
发明人： KITAMURA MASAO , UCHIDA SHUNSUKE , ASAKURA YAMATO , URATA MEGUMI
IPC分类号： G21D1/00 , G21D3/08

15. 发明专利

JPS6118144B2 JPS6118144B2 - 失效
公开(公告)号：JPS6118144B2
公开(公告)日：1986-05-10
申请号：JP2273680
申请日：1980-02-27
申请人： Hitachi Ltd
发明人： TOKOI HIROMI , KITAGUCHI HIROSHI , KITAMURA MASAO , OZAWA YOSHIHIRO , URATA MEGUMI , UCHIDA SHUNSUKE , ENDO MASAO
IPC分类号： G01T1/167 , G01T7/04 , G21C17/02 , G21C17/07

16. 发明专利

JPS6024438B2 失效
公开(公告)号：JPS6024438B2
公开(公告)日：1985-06-12
申请号：JP7431576
申请日：1976-06-25
申请人： HITACHI LTD
发明人： UCHIDA SHUNSUKE , UTAMURA MOTOAKI , URATA MEGUMI
IPC分类号： G21C17/07 , G21C17/06

17. 发明专利

JPS59112294A Device for removing radioactive iodine from nuclear fuel reprocessing plant 失效
标题翻译：从核燃料代用厂移除放射性碘的装置
公开(公告)号：JPS59112294A
公开(公告)日：1984-06-28
申请号：JP22180682
申请日：1982-12-20
申请人： Hitachi Ltd
发明人： KONDOU YOSHIKAZU , FUNABASHI KIYOMI , URATA MEGUMI , SAITOU MASAYUKI
IPC分类号： G21F9/02 , G21C19/42 , G21C19/46 , G21F9/00
CPC分类号： Y02W30/883

18. 发明专利

JPS58137454A CENTRIFUGAL SEPARATOR HAVING DOUBLE STRUCTURE 失效
公开(公告)号：JPS58137454A
公开(公告)日：1983-08-15
申请号：JP1795982
申请日：1982-02-05
申请人： HITACHI LTD
发明人： FUNABASHI KIYOMI , KAWAMURA FUMIO , TAKAGI TOSHIO , URATA MEGUMI , FUKAZAWA TETSUO
IPC分类号： B01J49/00 , B04B1/02 , B04B3/00 , B04B11/04 , B04B15/06
摘要： PURPOSE:To carry out separation treatment such as solid-solid separation or washing in good efficiency by one centrifugal separator, by forming the centrifugal separator from a basket shaped double structure consisting of a centrifugal precipitator and a centrifugal filter machine. CONSTITUTION:An upper and a lower end plates 15, 16 are fixed to a hollow non-perforated cylinder 2 provided to the outside to form an outer periphery container. In addition, to a hollow perforated cylinder 14 provided to the inner side, an upper and a lower end plates 17, 18 are fixed to form an inner periphery container. Both containers form an integrated rotor by fixing the lower end plate 18 to the lower end plate 16 so as to position a drive shaft 4 to the center thereof and the shaft 4 is connected to a motor through a fixing rod 12. In this structure, a liquid discharge pipe 5, a supply pipe 7, a scraper 8 and a washing pipe 13 are inserted into the inner periphery container while a filtrate discharge pipe 19 is inserted into the outer periphery container and the pipes 5, 19 are made movable by respective drive machines 6, 20. Therefore, a series of separation and treatment can be carried out in a same machine.

19. 发明专利

JPS57120876A Device for monitoring concentration of radioactivity 失效
标题翻译：监测放射性浓度的装置
公开(公告)号：JPS57120876A
公开(公告)日：1982-07-28
申请号：JP630381
申请日：1981-01-21
申请人： Hitachi Ltd
发明人： KUDOU MASASHI , FUJII MASAAKI , KITAGUCHI HIROSHI , URATA MEGUMI
IPC分类号： G01T1/167 , G01T7/02
CPC分类号： G01T7/02
摘要： PURPOSE:To obtain a monitoring device for concn. of radioactivity which does not cause radioactivity contamination due to splashes by providing a cover which is a means of protecting the detecting surface of a radioactivity detector against the splashes of flowing water while the flowing water is unstable. CONSTITUTION:In an initial stage when waste water 100 contg. radioactive materials is supplied from a waste water supply system, the shape of flowing water 101 released through a releasing nozzle 8 is unstable, and the detecting surface 15' of a radioactivity detector 15 is vulnerable to radioactivity contamination by splashes. Therefore, the detector 15 is beforehand moved in a home position where it goes apart from the inspecting position until the water 101 stabilizes. At the point of the time when the flowing water stabilizes, a cylinder 18 is operated to bring the detector 15 close to the water 101 and to set it in the inspecting position by means of a piston rod 19 and a pallet 20. Thence, the detector 15 is operated to detect the concn. of radioactivity of the waste water 100 and the signal thereof is put into a signal processing circuit 16, by which it is subjected to data processing; thereafter, it is recorded in a recorder 17. Thereby, the contamination of the detector 15 is prevented.
摘要翻译：目的：获取一个监控设备的放射性，其不会通过提供一种保护放射性检测器的检测表面而防止流水不流动的手段来防止溅射引起的放射性污染。构成：在废水100的初始阶段从废水供给系统供给放射性物质，由释放喷嘴8释放的流水101的形状不稳定，放射性检测器15的检测面15'容易受飞溅物的放射性污染。因此，检测器15预先在离开检查位置的初始位置移动，直到水101稳定。在流水稳定的时刻，操作气缸18使检测器15靠近水101，并通过活塞杆19和托盘20将其设置在检查位置。因此，检测器15被操作以检测该浓度。将废水100的放射性及其信号放入信号处理电路16中进行数据处理; 此后，将其记录在记录器17中。从而防止了检测器15的污染。

20. 发明专利

JPS5794694A METHOD OF DETECTING NUCLEAR FUEL FAILURE 失效
公开(公告)号：JPS5794694A
公开(公告)日：1982-06-12
申请号：JP17093480
申请日：1980-12-05
申请人： HITACHI LTD
发明人： URATA MEGUMI , KAMIYA KUNIO
IPC分类号： G21C17/07 , G21C17/06

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